Totally unrelated, but we managed to reduce our chassis weight (not by a lot, but still) and cut cost and manufacturing time more than half by moving away from a carbon fiber monocoque and using an "inferior" aluminum folded structure. This (and similar decisions throughout the car) reduced overall weight by a good 25kg and led us winning cost in both competitions we entered. Sounding "better" does not mean it is, so try to quantify everything.